INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax benefit (provision), due to higher estimated effective tax rate	$ 600
Income tax benefit	$ 4,791	$ 11,698	$ 23,209	$ 17,638
Effective income tax rate (as a percent)	22.00%		34.00%
Unrecognized tax benefits, including interest	$ 5,800		$ 5,800		$ 5,300
Unrecognized tax benefits that if subsequently recognized would reduce income tax expense	5,600		5,600		$ 5,100
Gross deferred tax asset	203,600		203,600
Portion of deferred tax assets that will be utilized upon future reversal of deferred tax liabilities	54,400		54,400
Portion of deferred tax assets that will be utilized based on forecasts of future taxable income	149,200		149,200
Deferred tax assets, U.S. federal operating loss carryforwards	$ 89,500		89,500
Future taxable income			$ 426,200